Re: BUG #1208: Invalid page header

Robert E. Bruccoleri <bruc@stone.congenomics.com>

From: "Robert E. Bruccoleri" <bruc@stone.congenomics.com>
To: tgl@sss.pgh.pa.us (Tom Lane)
Cc: bruc@acm.org, peter_e@gmx.net, pgman@candle.pha.pa.us, bruc@stone.congenomics.com, pgsql-bugs@postgresql.org, hubert.froehlich@bvv.bayern.de
Date: 2004-08-17T21:15:54Z
Lists: pgsql-bugs
Dear Tom,
> 
> 
> "Robert E. Bruccoleri" <bruc@stone.congenomics.com> writes:
> > 	Besides a no optimization compilation of 7.4.3, what else
> > would you recommend to explore this problem further? Thanks. --Bob
> 
> I really haven't the foggiest where to look :-(  I don't actually
> believe that it's a spinlock problem; that would explain pages getting
> substituted for other pages, in whole or in part, but you showed at
> least one example where a page was just overwritten with garbage.
> That looks more like a memory-stomp problem (again, assuming that it's
> software) and so could be anywhere.

Does the memory pattern in the garbage page look familiar?

> 
> Are you using any off-the-beaten-track code (contrib modules,
> non-btree indexes, non-mainstream data types)?  That stuff is less
> well debugged than the mainstream ...

No, it's all standard stuff (text, integers, floats, etc.).

Thanks. --Bob

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